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backends/cursor: Move out Xcursor functionality into own type

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Introduce a new type MetaCursorSpriteXcursor that is a MetaCursorSprite
implementation backed by Xcursor images. A plain MetaCursorSprite can
still be created "bare bone", but must be manually provided with a
texture. These usages will eventually be wrapped into new
MetaCursorSprite types while turning MetaCursorSprite into an abstract
type.

https://gitlab.gnome.org/GNOME/mutter/issues/77
This commit is contained in:
Jonas Ådahl
2018-04-27 15:43:37 +02:00
parent 2fc978ca9d
commit 3c538d4a92
9 changed files with 407 additions and 273 deletions
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248
src/backends/meta-cursor.c
View File

@ -23,15 +23,9 @@
#include "meta-cursor.h"
#include <string.h>
#include <X11/Xcursor/Xcursor.h>
#include "backends/meta-backend-private.h"
#include "backends/meta-cursor-renderer.h"
#include "clutter/clutter.h"
#include "cogl/cogl.h"
#include "meta/common.h"
#include "meta/prefs.h"
enum
{
@ -47,185 +41,34 @@ typedef struct _MetaCursorSpritePrivate
{
GObject parent;
MetaCursor cursor;
CoglTexture2D *texture;
float texture_scale;
int hot_x, hot_y;
int current_frame;
XcursorImages *xcursor_images;
int theme_scale;
gboolean theme_dirty;
} MetaCursorSpritePrivate;
G_DEFINE_TYPE_WITH_PRIVATE (MetaCursorSprite, meta_cursor_sprite, G_TYPE_OBJECT)
static const char *
translate_meta_cursor (MetaCursor cursor)
gboolean
meta_cursor_sprite_is_animated (MetaCursorSprite *sprite)
{
switch (cursor)
{
case META_CURSOR_DEFAULT:
return "left_ptr";
case META_CURSOR_NORTH_RESIZE:
return "top_side";
case META_CURSOR_SOUTH_RESIZE:
return "bottom_side";
case META_CURSOR_WEST_RESIZE:
return "left_side";
case META_CURSOR_EAST_RESIZE:
return "right_side";
case META_CURSOR_SE_RESIZE:
return "bottom_right_corner";
case META_CURSOR_SW_RESIZE:
return "bottom_left_corner";
case META_CURSOR_NE_RESIZE:
return "top_right_corner";
case META_CURSOR_NW_RESIZE:
return "top_left_corner";
case META_CURSOR_MOVE_OR_RESIZE_WINDOW:
return "fleur";
case META_CURSOR_BUSY:
return "watch";
case META_CURSOR_DND_IN_DRAG:
return "dnd-none";
case META_CURSOR_DND_MOVE:
return "dnd-move";
case META_CURSOR_DND_COPY:
return "dnd-copy";
case META_CURSOR_DND_UNSUPPORTED_TARGET:
return "dnd-none";
case META_CURSOR_POINTING_HAND:
return "hand2";
case META_CURSOR_CROSSHAIR:
return "crosshair";
case META_CURSOR_IBEAM:
return "xterm";
default:
break;
}
MetaCursorSpriteClass *klass = META_CURSOR_SPRITE_GET_CLASS (sprite);
g_assert_not_reached ();
}
Cursor
meta_create_x_cursor (Display *xdisplay,
MetaCursor cursor)
{
return XcursorLibraryLoadCursor (xdisplay, translate_meta_cursor (cursor));
}
static XcursorImages *
load_cursor_on_client (MetaCursor cursor, int scale)
{
return XcursorLibraryLoadImages (translate_meta_cursor (cursor),
meta_prefs_get_cursor_theme (),
meta_prefs_get_cursor_size () * scale);
}
static void
meta_cursor_sprite_load_from_xcursor_image (MetaCursorSprite *sprite,
XcursorImage *xc_image)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
MetaBackend *backend = meta_get_backend ();
MetaCursorRenderer *renderer = meta_backend_get_cursor_renderer (backend);
uint width, height, rowstride;
CoglPixelFormat cogl_format;
ClutterBackend *clutter_backend;
CoglContext *cogl_context;
CoglTexture2D *texture;
CoglError *error = NULL;
g_assert (priv->texture == NULL);
width = xc_image->width;
height = xc_image->height;
rowstride = width * 4;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
cogl_format = COGL_PIXEL_FORMAT_BGRA_8888;
#else
cogl_format = COGL_PIXEL_FORMAT_ARGB_8888;
#endif
clutter_backend = clutter_get_default_backend ();
cogl_context = clutter_backend_get_cogl_context (clutter_backend);
texture = cogl_texture_2d_new_from_data (cogl_context,
width, height,
cogl_format,
rowstride,
(uint8_t *) xc_image->pixels,
&error);
if (error)
{
meta_warning ("Failed to allocate cursor texture: %s\n", error->message);
cogl_error_free (error);
}
meta_cursor_sprite_set_texture (sprite, COGL_TEXTURE (texture),
xc_image->xhot, xc_image->yhot);
if (texture)
cogl_object_unref (texture);
meta_cursor_renderer_realize_cursor_from_xcursor (renderer, sprite, xc_image);
}
static XcursorImage *
meta_cursor_sprite_get_current_frame_image (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
return priv->xcursor_images->images[priv->current_frame];
if (klass->is_animated)
return klass->is_animated (sprite);
else
return FALSE;
}
void
meta_cursor_sprite_tick_frame (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
XcursorImage *image;
if (!meta_cursor_sprite_is_animated (sprite))
return;
priv->current_frame++;
if (priv->current_frame >= priv->xcursor_images->nimage)
priv->current_frame = 0;
image = meta_cursor_sprite_get_current_frame_image (sprite);
g_clear_pointer (&priv->texture, cogl_object_unref);
meta_cursor_sprite_load_from_xcursor_image (sprite, image);
return META_CURSOR_SPRITE_GET_CLASS (sprite)->tick_frame (sprite);
}
guint
unsigned int
meta_cursor_sprite_get_current_frame_time (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
if (!meta_cursor_sprite_is_animated (sprite))
return 0;
return priv->xcursor_images->images[priv->current_frame]->delay;
}
gboolean
meta_cursor_sprite_is_animated (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
return (priv->xcursor_images &&
priv->xcursor_images->nimage > 1);
return META_CURSOR_SPRITE_GET_CLASS (sprite)->get_current_frame_time (sprite);
}
MetaCursorSprite *
@ -234,47 +77,13 @@ meta_cursor_sprite_new (void)
return g_object_new (META_TYPE_CURSOR_SPRITE, NULL);
}
static void
meta_cursor_sprite_load_from_theme (MetaCursorSprite *sprite)
void
meta_cursor_sprite_clear_texture (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
XcursorImage *image;
g_assert (priv->cursor != META_CURSOR_NONE);
priv->theme_dirty = FALSE;
/* We might be reloading with a different scale. If so clear the old data. */
if (priv->xcursor_images)
{
g_clear_pointer (&priv->texture, cogl_object_unref);
XcursorImagesDestroy (priv->xcursor_images);
}
priv->current_frame = 0;
priv->xcursor_images = load_cursor_on_client (priv->cursor,
priv->theme_scale);
if (!priv->xcursor_images)
meta_fatal ("Could not find cursor. Perhaps set XCURSOR_PATH?");
image = meta_cursor_sprite_get_current_frame_image (sprite);
meta_cursor_sprite_load_from_xcursor_image (sprite, image);
}
MetaCursorSprite *
meta_cursor_sprite_from_theme (MetaCursor cursor)
{
MetaCursorSprite *sprite;
MetaCursorSpritePrivate *priv;
sprite = meta_cursor_sprite_new ();
priv = meta_cursor_sprite_get_instance_private (sprite);
priv->cursor = cursor;
priv->theme_dirty = TRUE;
return sprite;
g_clear_pointer (&priv->texture, cogl_object_unref);
}
void
@ -310,18 +119,6 @@ meta_cursor_sprite_set_texture_scale (MetaCursorSprite *sprite,
priv->texture_scale = scale;
}
void
meta_cursor_sprite_set_theme_scale (MetaCursorSprite *sprite,
int theme_scale)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
if (priv->theme_scale != theme_scale)
priv->theme_dirty = TRUE;
priv->theme_scale = theme_scale;
}
CoglTexture *
meta_cursor_sprite_get_cogl_texture (MetaCursorSprite *sprite)
{
@ -331,15 +128,6 @@ meta_cursor_sprite_get_cogl_texture (MetaCursorSprite *sprite)
return COGL_TEXTURE (priv->texture);
}
MetaCursor
meta_cursor_sprite_get_meta_cursor (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
return priv->cursor;
}
void
meta_cursor_sprite_get_hotspot (MetaCursorSprite *sprite,
int *hot_x,
@ -372,11 +160,10 @@ meta_cursor_sprite_prepare_at (MetaCursorSprite *sprite,
void
meta_cursor_sprite_realize_texture (MetaCursorSprite *sprite)
{
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
MetaCursorSpriteClass *klass = META_CURSOR_SPRITE_GET_CLASS (sprite);
if (priv->theme_dirty)
meta_cursor_sprite_load_from_theme (sprite);
if (klass->realize_texture)
klass->realize_texture (sprite);
}
static void
@ -395,9 +182,6 @@ meta_cursor_sprite_finalize (GObject *object)
MetaCursorSpritePrivate *priv =
meta_cursor_sprite_get_instance_private (sprite);
if (priv->xcursor_images)
XcursorImagesDestroy (priv->xcursor_images);
g_clear_pointer (&priv->texture, cogl_object_unref);
G_OBJECT_CLASS (meta_cursor_sprite_parent_class)->finalize (object);